Substrate for antenna device



FIG. 1 is a perspective view of a substrate for antenna device, showing our new design; and,

FIG. 2 is a front view thereof.

The dash and dash broken lines represent portions of the substrate for antenna device that do not form part of the claimed design. Dotted and dashed lines define the bounds of the claimed design and form no part of the claimed design. 

CLAIM The ornamental design for a substrate for antenna device, as shown and described. 